Mixed 1D-2D quantum electron transport in percolating gold film

Abstract

The gold film (mean thickness ≈ 3.5 nm) was condensed in high vacuum at temperature 70 K on single-crystal sapphire substrate. The transport properties of the film at low temperature reveal simultaneously indications of 1D and 2D quantum interference effects of weak localization and electron-electron interaction. It is shown that this behavior is determined by inhomogeneous electron transport at the threshold of thickness-controlled metal-insulator transition.

Dephasing in strongly anisotropic black phosphorus

“…These are (i) strong confinement due to a 1D potential, as mentioned above and (ii) dephasing by edge domain granularity [42]. The crystalline order in our bP FET was carefully investigated by way of both unpolarized and polarized micro-Raman measurements, and these data strongly suggest the bP flake to be an homogeneous single crystal (see Supplemental Material [43]) rendering the granularity scenario unlikely.…”